diff --git a/src/ieee754.c b/src/ieee754.c
index bcad14d..12877bd 100644
--- a/src/ieee754.c
+++ b/src/ieee754.c
@@ -459,7 +459,7 @@
     const uint64_t uDroppedSingleBits = DOUBLE_SIGNIFICAND_MASK >> SINGLE_NUM_SIGNIFICAND_BITS;
         
     // The various cases
-    if(uDouble == 0) {
+    if(d == 0.0) { // Take care of positive and negative zero
         // Value is 0.0000, not a a subnormal
         result.uTag = IEEE754_UNION_IS_HALF;
         result.u16  = IEEE754_DoubleToHalf(d);